敖翔保外就医:cannot resolve symbol——javabean编译问题

package test;
import java.io.PrintStream;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Date;
import java.sql.*;
public class bbsuser
{

public bbsuser()
{
dbconn = new bbsreg();
rs = null;
userid = 0;
username = null;
userpassword = null;
useremail = null;
userhomepage = null;
hpname = null;
usersex = null;
comefrom = null;
usersign = null;
userclass = 0;
userbirthday = new Date();
dateandtime = new Date();
}

public void changeUserClass(String s, int j)
{
strSQL = "update user set userclass=userclass+" + j + " where username='" + s + "'";
dbconn.executeUpdate(strSQL);
}

省略一部分...
编译时：bbsuser.java:280: cannot resolve symbol
symbol : class bbsreg
location: class test.bbsuser
bbsreg dbconn;
^
bbsuser.java:14: cannot resolve symbol
symbol : class bbsreg
location: class test.bbsuser
dbconn = new bbsreg();
^
2 errors
用javac在dos下编，记事本看.java文件。请问如何引用？